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3 years ago

When vinegar and baking soda are combined bubbles begin to form. Bubbles are evidence of a chemical reaction because they

Chemistry

1 answer:

Varvara68 [4.7K]3 years ago

7 0

Answer:

bubbled

Explanation:

its simple they bubbled

signs of chemical reactions are change of

odor

bubbles

solid turns liquid

liquid turns solid

change of color

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7.) A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 atm. To

marysya [2.9K]

Answer:

T₂ = 721 k

Explanation:

Given data:

Initial volume = 285 mL

Initial pressure = 1.88 atm

Initial temperature = 355 K

Final temperature = ?

Final volume = 435 mL

Final pressure = 2.50 atm

Formula:

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₁V₁/T₁ = P₂V₂/T₂

T₂ = P₂V₂ T₁ / P₁V₁

T₂ = 2.50 atm × 435 mL × 355 K / 1.88 atm × 285 mL

T₂ = 386062.5 atm. mL. K /535.8 atm. mL

T₂ = 721 k

5 0

3 years ago

If you prefer to learn by reading to your self instead of participating in a group discussion, you are most likely a what kind o

Drupady [299]

Intrapersonal or solitary learner

7 0

3 years ago

Read 2 more answers

Anybody Understand this question please help me !

zlopas [31]

Answer:

$m_{Sn}=630.57gSn$

Explanation:

Hello!

In this case, according to the chemical reaction:

$SnO_2+2H_2\rightarrow Sn+2H_2O$

We can evidence the 2:1 mole ratio between hydrogen and tin, thus, we perform the following stoichiometric setup to obtain the mass of produced tin:

$m_{Sn}=21.46gH_2*\frac{1molH_2}{2.02gH_2}*\frac{1molSn}{2molH_2} *\frac{118.71gSn}{1molSn} \\\\m_{Sn}=630.57gSn$

Best regards!

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3 years ago

Which category does the ion PO43- belong to?

Katena32 [7]

Answer:

c polyatomic anion

Explanation:

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3 years ago

Perform the following operation and express the answer in scienfific notation 7.5x1-^9 - 2.5 x 10^8

asambeis [7]

34^67 42’063 1220 thank you

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1 year ago